It is well known that TOO LITTLE vitamin D is associated with health problemsTOO MUCH vitamin D may also be associated with health problems

Possible reasons include:

Body is out of balance with too much vitamin D – consider adjusting cofactorsCURE: Increase Vitamin K2 - prevents excess Calcium created by lots of vitamin D from going to wrong places in body (arteries, prostate, etc)
CURE: Increase Magnesium – which is vital for health but is consumed by Vitamin D
CURE: Reduce Calcium – which may be in excess due to high level of vitamin D

We evaluated the impact of standardizing the originally measured serum total 25-hydroxyvitamin D (25(OH)D) values from Third National Health and Nutrition Examination Survey (NHANES III, 1988-1994) on the association between 25(OH)D and rate of all-cause mortality. Values were standardized to the gold-standard laboratory method. Follow-up from 1990-2006 consisted of 15,099 participants aged at least 20 years at baseline, among whom there were 3,784 deaths. Relative risk of death was adjusted for age, sex, race/ethnicity, and season using Poisson regression.

In summary, after standardization, risk of death from all causes increased with decreasing 25(OH)D <40 nmol/L, while there was no association with values in categories between 40 nmol/L and 120 nmol/L.